.tab ul{
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    justify-content: space-around;
}

.tab ul li {
    flex-basis: 15%;
    text-align: center;
    line-height: 34px;
    background-color: #fff;
    border-radius: 5px;
    cursor: pointer;
}